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Main => Monitor/Video Forum => Topic started by: skydemon on May 13, 2005, 12:34:01 am

Title: horizontal frequency question
Post by: skydemon on May 13, 2005, 12:34:01 am

Hey all, just a quick question...

Just wondering if all the people with duel freq monitors (15/25Khz) use the low or high setting? Im testing mine on high but it means I cant select a lot of lower res in advv due to the high vertical freq it usually specifies (100Hz or so) for 25Khz monitors. The only way I can see to choose these resolutions is to change the monitor to the low freq setting...

Title: Re: horizontal frequency question
Post by: skydemon on May 16, 2005, 07:07:57 pm

bump

Title: Re: horizontal frequency question
Post by: wpcmame on May 17, 2005, 03:52:54 am

Monitors always display the same number of lines regardless of resolution.

In 25KHz your monitor displays ~350-400 lines and in 15KHz it displays ~240-290 lines.

If you display a lowres resolution (e.g. 320x240) in 25KHz it will only occupy ~2/3 of the screen.

(If you are interested in how to display the lowres resolutions in 25KHz anyway, I'll explain it in another post)

Title: Re: horizontal frequency question
Post by: skydemon on May 17, 2005, 11:11:10 pm

Ah ok that makes sense, could you explain how to display the lowres res at 25Khz though? thanks mate!

Title: Re: horizontal frequency question
Post by: radMonkey on May 18, 2005, 06:55:34 am

What are you using? Linux or Windows? What software will you be running? MAME?

Title: Re: horizontal frequency question
Post by: skydemon on May 18, 2005, 11:08:00 pm

its running in dos right now (may be putting in linux eventually)

im running advmame (latest version) and advmenu on a nanao 26" monitor with dual 15/25Khz